Add analyze_bcpf.py script to help manage bootclasspath_fragments am:...

Add analyze_bcpf.py script to help manage bootclasspath_fragments am: 4dcf6595 am: a87d1488 am: 04c32d2b am: ff489b61

Original change: https://android-review.googlesource.com/c/platform/build/soong/+/2020741



Change-Id: I88e015b1bd8763605c57d12715b9e703a3d7d74f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>